.app {
  width: 600px;
  margin: 0 auto;
}
.start {
}
.container {
  border: 1px solid;
  border-radius: 8px;
  width: 400px;
  height: 400px;
  margin-top: 50px;
  display: flex;
  align-items: center;
  justify-content: center;
}
.container-arrows {
  height: 400px;
  width: 400px;
  display: flex;
  justify-content: center;
  align-items: center;
}

.arrow-item {
  display: none;
}
.container-text {
  width: 400px;
  height: 400px;
  line-height: 400px;
  color: red;
  font-size: 40px;
  font-weight: 500;
  text-align: center;
  display: none;
}
